COURTESY

[noun] - polite behaviour, or a polite action or remarkYou might get on better with your parents if you showed them some courtesy. [U]He could at least have had the courtesy to say sorry. [U + to infinitive]The President welcomed the Queen with the usual courtesies. [C]Phil Collins appears on the album (by) courtesy of (= by permission of) Virgin Records.Did the Conservatives win (by) courtesy of (= because of) the division of the opposition vote between Labour and the Liberal Democrats?